The Frame Trigger Wait Signal - Basler GIGE VISION ace acA640-100gm/gc Manual

Image Acquisition Control

6.10.2 The Frame Trigger Wait Signal

To help you avoid these overtrigger situations, the camera supplies a Frame Trigger Wait output
signal. This output signal can be assigned to output line 1 on the camera.
As you are acquiring frames, the camera automatically calculates the earliest moment that it is safe
to trigger each new acquisition. The Frame Trigger Wait signal will go high when it is safe to trigger
an acquisition, will go low when the acquisition has started, and will go high again when it is safe to
trigger the next acquisition. If you base your use of the ExFSTrig signal on the state of the of the
Frame Trigger Wait signal, you can avoid overtriggering the camera.
Figure 43 illustrates the Frame Trigger Wait signal with the camera set for the trigger width
exposure mode and with exposure and readout overlapped.
Frame Trigger
Wait Signal
ExFSTrig
Signal
Fig. 43: Frame Trigger Wait Signal
For more information about assigning the Frame Trigger Wait signal to output line 1, see
Section 9.2.1 on
For more information about hardware triggering, see Section 6.4.3 on
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Signal goes high Signal goes low
at earliest safe when exposure
moment to trigger for acquisition
acquisition N+1 N+1 begins
Frame Acquisition N
Exposure Readout
Note
The frame trigger wait signal will only be available when hardware frame start
triggering is enabled.
page 130.
Signal goes high
at earliest safe
moment to trigger
acquisition N+2
Frame Acquisition N+1
Exposure Readout
Time
Signal goes low
when exposure
for acquisition
N+2 begins
Frame Acquisition N+2
Exposure Readout
page 64.
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